Would ne nice to have FireBase as a backend for Hybrid Mobile Apps, there as been some work with Kendo DataSource but it is bitty. It would be nice to be able to swap between Everlive/Firebase/Azure depending on client needs whilst keeping the code base investment. Firebase provides a lot of basic features cheaper than Everlive, Azure is pricy but comprehensive. Everlive is not that generous but has a good feature mix - its risky if you are not making a lot of money from your app unlike Firebase.

When Simulator dialog pops, I found that it is connecting to XXX.google.com. For some reasons it would not be assessable for user in China. Please consider to add alternative or fallback if that happens.

AppBuilder code has integration with version control but not the Business Logic Cloud code for Data and Cloud Functions. It would be helpful to be able to use GitHub to see how code has changed overtime.

I work on a team, with multiple people pushing versions of apps to the app manager and publishing them for testing purposes. It would be nice to see which user uploaded and published any particular version of the app in AppManager. It could be two different people, as well (one to upload, one to publish).